Passenger bus



FIG. 1 is a top, front and right side perspective view of a passenger bus showing our new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a top, front and left side perspective view thereof.

The environmental structures shown in broken lines throughout the drawings are for illustrative purposes only and form no part of the claimed design. Portions of the bus not shown in the drawings form no part of the claimed design. 

CLAIM We claim the ornamental design for a passenger bus, as shown and described. 